Scientists Discover: Green Tea Helps Keep the Brain in Shape. Its Component EGCG Cleanses Neurons of Toxic Proteins, Restores Energy, and Improves Memory, Attention, and Mood.
Regular green tea may serve as a natural "booster" for the brain — this is the conclusion reached by scientists from the University of California. Recent research has shown that the main component of green tea, epigallocatechin gallate (EGCG), can profoundly affect nerve cells.
EGCG literally "reboots" aging neurons: it restores their energy balance and triggers "cellular housekeeping" processes — the natural cleansing of cells from toxic proteins (including beta-amyloid, a key factor in Alzheimer’s disease). Just one day of this effect leads to a brain that feels refreshed: memory, attention, and mood improve, while stress levels decrease. To maintain such effects, approximately 800 ml of freshly brewed green tea should be consumed daily.
Natural Stimulator for Neurons
Green tea has long been renowned for its beneficial properties and tonic effect. Today, scientific research continues to unveil new dimensions of its influence on the body. The latest work by scientists published in the journal GeroScience revealed an unexpected property of green tea: the antioxidant contained in it, EGCG, proved to be a powerful stimulator for brain cells.
In laboratory experiments, the combination of EGCG with vitamin B3 (niacinamide) literally revitalized aging neurons, significantly improving their condition. This result surprised researchers and confirmed the reputation of green tea as a "elixir" for the brain.
Rebooting Aging Neurons
As we age, brain cells gradually lose their "energy supply." The level of guanosine triphosphate (GTP) — a molecule that serves as the energy source for cellular processes — decreases in neurons. Without this "fuel," mitochondrial function suffers, and the mechanisms for neuronal self-repair slow down. Consequently, aging cells accumulate damage and lose their functions.
However, the addition of EGCG (in conjunction with niacinamide) effectively allowed for the rebooting of old neurons. Within just 24 hours of the experiment, the energy balance of the cells was restored almost to "youthful" levels. Neurons received sufficient energy for normal operation again. At the same time, oxidative stress levels decreased, and cell survival rates increased — making them less prone to cell death.
"Cellular Housekeeping" of the Brain from Proteins
Another issue for the aging brain is the accumulation of "debris" within the cells. When "cellular housekeeping" processes (such as autophagy) slow down, neurons fail to effectively eliminate defective and toxic proteins. One of the most dangerous is beta-amyloid, a protein that forms plaques in the brain as one ages. Accumulations of beta-amyloid are considered a key factor in the development of Alzheimer's disease: these deposits disrupt connections between neurons and lead to cell death.
According to the study, EGCG activates "cellular housekeeping" processes in neurons. It initiates the mechanism by which toxic protein aggregates, including accumulated beta-amyloid, are expelled from the cells. In other words, green tea helps the brain cleanse itself of harmful deposits that hinder its normal function. This "spring cleaning" significantly reduces the risk of damage and death of brain cells.
Improvement in Memory and Mood
The restoration of energy and the cleansing of the brain quickly reflect on its functionality. Specialists note that after just one day, the brain appeared "refreshed." A range of positive changes in cognitive function was documented:
- Improved memory (easier to recall information).
- Increased focus (greater concentration).
- Improved mood (less anxiety and apathy).
- Reduced stress levels (a sense of calm).
Collectively, these changes mean that the brain starts to function more efficiently and is in a more balanced, healthy state.
Daily Green Tea: How Much and How to Drink
To keep the brain in shape, scientists recommend regular consumption of green tea. The optimal "dosage" is around 800 ml per day, equating to approximately 3-4 cups of freshly brewed tea.
It’s essential to follow a few simple rules to maximize the benefits from this beverage:
- Choose high-quality loose-leaf tea without additives — it contains more beneficial polyphenols, including EGCG.
- Brew green tea not with boiling water but with water around 75–80 °C. At higher temperatures, some valuable substances break down.
- Steep the tea for 2–3 minutes — this is sufficient to extract EGCG and other beneficial components.
- Drink the beverage freshly brewed, without letting it sit for long — this way, you will get the maximum antioxidants.
- Distribute your daily 3–4 cups in the first half of the day. Avoid strong tea in the evening (especially if you are sensitive to caffeine) to prevent sleep disturbances.
In general, about four cups of green tea a day are considered a safe norm for healthy adults. In this volume, the beverage fully reveals its beneficial properties.
New Perspectives for Brain Health
Current results pave the way for new strategies to protect the brain from aging. Scientists hope that based on EGCG, effective and safe means for dementia prevention and Alzheimer's therapy can be developed. However, as of now, the data has only been obtained in laboratory conditions, and further testing on animals and humans is necessary before recommending EGCG as a medication.
Nevertheless, it is already evident: natural substances can have a powerful positive impact on the brain. Observations show that green tea lovers generally encounter dementia less frequently on average. It is now clear why this beverage is so beneficial for the nervous system.
Thus, incorporating several cups of green tea into your daily diet is a simple and accessible means of supporting your brain, helping to maintain clarity of mind and strong memory for many years to come.
